Sarkar N K, Fuys R A, Schoenfeld C M, Armstrong L M, Stanford J W
J Oral Rehabil. 1981 Sep;8(5):401-11. doi: 10.1111/j.1365-2842.1981.tb00514.x.
The interaction between tooth and amalgam during in vitro corrosion of dental amalgams has been studied in this investigation. Extracted teeth have been restored with five commercial amalgams, one of which was gamma 2 -free and the others contained the gamma 2-phase. The restored teeth were immersed in a 1% NaC1 solution for 9 months. Post corrosion restorations have been examined by optical microscopy, scanning electron microscopy, and X-ray microanalysis. The results are: (1) gamma 2-containing amalgam surfaces were covered with Ca-Sn-P-rich corrosion products of various morphology which occasionally contained relatively low concentrations of C1 and/or Zn; (2) the corrosion products on the gamma 2-free amalgam surface indicated relatively high concentrations of Hg in addition to Ca, p, Sn, Cu, and Zn. These results agree with the past observations that corrosion of amalgam restorations is not an isolated process. Rather it may involve reactions of the restoration and the surrounding oral environment including tooth and oral fluids in which interactions of Sn, Zn, Hg, Ca and P take place.
本研究对牙科汞合金在体外腐蚀过程中牙齿与汞合金之间的相互作用进行了研究。用五种市售汞合金对拔除的牙齿进行修复，其中一种不含γ2相，其他几种含有γ2相。将修复后的牙齿浸泡在1%的NaCl溶液中9个月。采用光学显微镜、扫描电子显微镜和X射线微分析对腐蚀后的修复体进行了检查。结果如下：（1）含γ2相的汞合金表面覆盖着形态各异的富含Ca-Sn-P的腐蚀产物，这些产物偶尔含有相对较低浓度的Cl和/或Zn；（2）不含γ2相的汞合金表面的腐蚀产物除了含有Ca、P、Sn、Cu和Zn外，还显示出相对较高浓度的Hg。这些结果与过去的观察结果一致，即汞合金修复体的腐蚀不是一个孤立的过程。相反，它可能涉及修复体与周围口腔环境（包括牙齿和口腔液体）的反应，其中Sn、Zn、Hg、Ca和P会发生相互作用。
